If on an average 9 shops out of 10 return safely to a port, the probability of one ship does not reach safely is

If on an average 9 shops out of 10 return safely to a port,the probability of one ship returns safely is

If on an average 9 ships out of 10 arrive safely to ports, find the mean and S.D. of ships returning safely out of a total of 500 ships.

If on an average 9ships out of 10 arrive safely to ports,find the meen and S.D.of ships returning safely out of a total of 500 ships.

If on an average 1 ship out of 10 do not arrive safely to ports. Find the mean and the standard deviation of the ships returning safely out of a total of 500 ships.

If on an average, out of 10 ships, one is drowned, then what is the probability that out of 5 ships atleast 4 reach safely ?

If on an average 1 ship out of 10 do not arrive safely to parts . Find the mean and the standard deviation of the ships returining safely out of a total of 500 ships .

If one out of 10 coming ships is wrecked.Find the probability that out of five coming ships at least 4 reach safely.

If on an average 1 ship in every 10 sinks, find the chance that out of 5 ships atleast 4 will arrive safely.

The probability of any ship return safely to the port is (1)/(5). Find the probability that the returning out of 4 ships,

If one out of 10 coming ships is wrecked. Find the probability that out of five coming ships at least 4 reach safely.